nyctalus247the region on each side of it flat or slightly depressed; lambdoidcrest high, curved abruptly forward at point of junction withsagittal crest; floor of brain-case with small but evident lateralpits, well defined anteriorly but communicating posteriorly withvacuity between cochlea and basioccipital; auditory bullse welldeveloped but of moderate size, the transverse diameter aboutequal to distance between bullse. Interorbital region deeplyconstricted, short hour-glass shaped, the lachrymal region widen¬ing abruptly to a breadth nearly equal to that of brain-case, andforming a slight though e-vident tuber¬cular projection over anterior rim of orbit;rostrum squarish, somewhat narroweranteriorly than posteriorly, the oval orovate narial emargination extending backto level of lachrymal foramen; rostraldepth at front of orbit about equal todistance from orbit to front of innerincisor; anteorbital foramen small, overspace between large premolar and firstmolar, lachrymal foramen slightly aboveand behind it, on orbital rim. Palaterather short, owing to the large size ofthe anterior emargination, the posterior , ","" "'. , , t. , . , . ° , 1 .ji . 1 n J, Kyctalus noctvZa,.edge ot which is on level with middle ot nat. size.large premolar, rather evidently concavelaterally, less so longitudinally. Posterior extension of palatenearly parallel sided, its width at level of posterior edge of thirdmolar slightly less than length ; hamulars barely turned inward ;median spine large, acute. Mandible robust, noticeably deeperat symphysis than immediately behind tooth-row; posteriorportion rather low and long, the height of coronoid processabove alveolus less than least length, the upper border slopinggradually from coronoid to articular process ; angular processmoderately long, about on level with alveolar line, its mainaxis directed rather abruptly outward, its distal extremityobliquely widened. Teeth.—Relatively to size of skull the teeth are large, thoughthe cusps are rather low. Inner upper incisor slender, -withslightly developed cingulum, its crown area barely one quarterthat of canine, the nearly terete shaft directed obliquely inward,its apex extending slightly beyond level of cingulum of canine,its secondary cusp small but e-vident, situated on postero-externalsurface of shaft; outer upper incisor with crown area distinctlygreater than that of inner tooth, the shaft deeply concave, itsconcavity directed outward and backward, the main cusp lying closeagainst secondary cusp of inner tooth, the well-defined se-.iondarycusp relatively much larger than that of inner incisor, cingulumwell developed, bearing a small but distinct antero-external cuspon opposite side of concavity from secondary cusp. The two